Phase Diagrams

What will occur when the substance transitions from B to A? (Diagram A)

• condensation

• evaporation

• melting

• freezing

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What will occur when the substance changes from 1 atm to 30 at a constant temperature of -15^oC? (Diagram A)

• condensation

• deposition

• melting

• sublimation

Tags

NGSS.MS-PS1-4

What is the normal boiling point of this substance? (Diagram C)

• 150 °C

• 100 °C

• -50 °C

• 0 °C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the normal melting point of this substance? (Diagram C)

• 150 °C

• 100 °C

• -50 °C

• 0 °C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is point A? (Diagram C)

• triple point

• critical point

• equilibrium point

• normal melting point

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

At higher temperatures

• particles in an object have less energy
• particles in an object move faster
• a gas contracts

Tags

NGSS.MS-PS1-4

What type of process is happening as one moves along line segment B toward the right? (Diagram F)

• An endothermic Process

• An exothermic Process

• The calorimetry process

• Nuclear fusion

Tags

NGSS.MS-PS1-4

Water exists as a _____________ at 700 mmHg and 50 °C.

• solid
• liquid
• gas
• supercritical fluid

Tags

NGSS.MS-PS1-4

What phase change(s) may occur at pressures below 4.58 mmHg?

• sublimation/deposition
• melting/freezing
• all phase changes are possible at these pressures
• vaporization/condensation

Which statement is true for carbon dioxide at -60 °C?

• All three phases are possible.
• It can exist as a solid or a gas, depending on pressure.
• It is a solid.
• With enough pressure it can be melted.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4